Prologue by the editor-in-chief: "A bit more than two years ago, while I was still serving at BeNews, I asked Jeremy Friesner to write an article and present his cross-platform client-server messaging system for dynamic distributed applications, MUSCLE. Two weeks later, he came back to me with a multi-page article, explaining MUSCLE. To demonstrate the power of MUSCLE, Jeremy created a demo application based on it. The result was BeShare.